Ahmad, N., M. Z. Zainuddin, M. S. Yahya, and D. N. Dawanas. “The Observations of Hï¡, Fe II and He I in Classical Be Stars”.
Malaysian Journal of Science
, vol. 28, no. 3, Dec. 2009, pp. 315-22, doi:10.22452/mjs.vol28no3.9.